Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1069b94e75f45cd…

MALICIOUS

PDF

69.9 KB Created: 2021-09-30 20:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b988caea8ea8ff9218768572bc97ac6c SHA-1: a1238d91f875ec86b214c47c341d1c2045bf4cee SHA-256: e1069b94e75f45cdeed756a9574abb8338b70815f7c94fc2b97ff62e28f4faf7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple external URIs, including one pointing to a raw IP address, and is flagged as a link farm on disposable hosting. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism. The presence of numerous links suggests an attempt to redirect the user to malicious content or download further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://konikanarrowfab.com/ckfinder/userfiles/files/pijunod.pdf In PDF document text
    • http://raegcafe.com/uploads/files/gowobonaxukidak.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/41465264119.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/5263751731.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210917202906.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/41617889511.pdfIn PDF document text
    • https://kaimano.it/file/53813800293.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/tonutozipul.pdfIn PDF document text
    • https://theipbuzz.com/images/file/vidavikewobiwusatuf.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/fababilaza.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/sadinapilagamekugir.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/78455725502.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210906_055851.pdfPDF link annotation
    • http://www.pranabkumar.com/fckimages/file/waneb.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbd8b2d900---43285377247.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/3477058853.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/63089481650.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/papijamozelifila.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16153c337a87a5---gevejipekidup.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/kelotigiva.pdfIn PDF document text
    • http://ceramkgres.ru/userfiles/file/mowinujananij.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/89314311756.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=dream+league+soccer+2015+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE44 11044 bytes
SHA-256: cde1e6a870c066b5d3ebbb6119c0fe97ccfd2244729c73b06577dba3fd910793
font_01_sfnt_off0000c820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC820 16432 bytes
SHA-256: 047dc5c53d974e0ea313b86b13504ec33f3b05d5a253875c05739f4ffa4bb8b9
font_02_sfnt_off0000f240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1